What is meant by the term frequency of a wave?
Ultrasound waves travel through human tissue at a speed of 1540 m/s1540\text{ m/s}1540 m/s and have a frequency of 2.2×106 Hz2.2 \times 10^6\text{ Hz}2.2×106 Hz.
(i) State the equation linking wave speed, frequency, and wavelength.
(ii) Calculate the wavelength of these ultrasound waves in human tissue.
Below is a diagram showing ocean waves approaching a narrow gap in a harbour breakwater:
(i) Explain how this curved wave pattern is produced inside the harbour.
(ii) Explain why ocean waves diffract significantly through this gap, but short-wavelength radio waves passing through the same gap do not show this curved diffraction pattern.
